And during the ancient Roman festival of Lupercalia, everyone got wasted and a bunch of mostly naked young men went around in goatskin loincloths and whipped a gathered crowd of (very, very willing) women in the name of fertility.

the red wedding episode: 'The Rains of Castamere' (which if you read the books you know about the red wedding you know that Talisa/Jeyne was not even there...quite a big plot change, since she was also pregnant in the books)